We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate Now! Help keep this site free and ads-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:04  
clear_day Transit: 12:06  
SunsetSet: 18:09
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Monoceros » 

HR2731

Altitude: -29.7°   Azimuth: 306.2°   Direction: North-West

HR2731 is a double giant star in the constellation of Monoceros.

HR2731 visual magnitude is 5.75. Because of its reltive faintness, HR2731 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR2731 is -0.015 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2731 star
DSS2 image of HR2731. The red arrow shows the motion of HR2731 during the next 10000 years (-2.50 arcmin in Right Ascension and 1.17 arcmin in declination);

Key facts about HR2731

5.75
Giant

HR2731 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -29.7°
Azimuth: 306.2°
Direction: North-West

Celestial coordinates and finder chart of HR2731

HR2731 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR2731 are provided in the following table:

07h 14m 11s
-03° 54’ 05”
219.01°
3.27°
Monoceros

The simplified sky map below shows the position of HR2731 in the sky:

Finder chart HR2731 star
Simplified finder chart for HR2731.

Visibility of HR2731 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR2731 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 93.9°
Max altitude: 34.6°
Azimuth: 266.1°

Distance of HR2731 from the Sun and relative movement

HR2731 is distant 612.78 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

187.97 pc
612.78 ly
22 km/s
-0.015 arcsec/year
0.007 arcsec/year

Spectral properties of HR2731

HR2731 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

-0.62
K5III
3677K

The red dot in the diagram below shows where HR2731 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR2731. Attribution: Richard Powell / CC BY-SA

HR2731 star system properties

HR2731 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR2731 double sysyem:

5.75
10.75
5
2.7 arcsec

Alternative designations of HR2731

SAO134391
SAO134391